This 10I-ST 10A controller is Only For off-Grid PV Solar System.
3 Control modes to choose:

1.Charge Only

2.Light Control

3.Light and 15hours timer control(Settable)

For 10A 12V Pv System: 120W Solar Panel,12V Lead-acid Battery,21V for Max input
Voltage
For 10A 24V Pv System: 240W Solar Panel,24V Lead-acid Battery,42V for Max input
Voltage
Features:
1.Microcontroller digital accuracy
2.PWM charge mode & State of Charge(SOC)
3.Fully automatic operation & Electronic protections
4.Detects day and night using the PV array, timer setting
5.Double digital LED display, numbers equal to timer setting
6.Temperature compensation, with inside temperature sensor
7.Big terminals, big distance between terminals
Rating:
10I: 12 Volt or 12/24 Volt auto work, 10 Amps (for PV and load)
Equalisation voltage: 14.8Volt
High voltage disconnect(HVD): 14.4Volt
Float voltage: 13.6Volt
Low voltage disconnect(LVD) 11.1Volt
Low voltage reconnect(LVR): 12.6Volt
Self-consumption: 6mA maximum
Temperature compensation: -30mV/degree centigrade/12V
Terminals: for wire sizes to 6mm2
Temperature: -35degree centigrade to +55degree centigrade